+1 on someone likely swapping out the speedo. The odometer is part of the speedo, so unless the PO went to great pains to make it match the (presumably) dead gauge they took out, it's probably not correct. I haven't had an orange dash apart, but I assume the tint is a layer of orange paint or plastic between the bulbs and the gauge. It might be difficult to match, but yeah, if you can find orange condoms for the bulbs (or orange LEDs), that might get it close enough.